420422240197 has 2 divisors, whose sum is σ = 420422240198. Its totient is φ = 420422240196.

The previous prime is 420422240101. The next prime is 420422240317. The reversal of 420422240197 is 791042224024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 412402858596 + 8019381601 = 642186^2 + 89551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420422240197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420422240597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210211120098 + 210211120099.

It is an arithmetic number, because the mean of its divisors is an integer number (210211120099).

Almost surely, 2^420422240197 is an apocalyptic number.

It is an amenable number.

420422240197 is a deficient number, since it is larger than the sum of its proper divisors (1).

420422240197 is an equidigital number, since it uses as much as digits as its factorization.

420422240197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 420422240197 in words is "four hundred twenty billion, four hundred twenty-two million, two hundred forty thousand, one hundred ninety-seven".